-- This file is part of the Wire Server implementation.
--
-- Copyright (C) 2025 Wire Swiss GmbH <opensource@wire.com>
--
-- This program is free software: you can redistribute it and/or modify it under
-- the terms of the GNU Affero General Public License as published by the Free
-- Software Foundation, either version 3 of the License, or (at your option) any
-- later version.
--
-- This program is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-- FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
-- details.
--
-- You should have received a copy of the GNU Affero General Public License along
-- with this program. If not, see <https://www.gnu.org/licenses/>.

module Wire.UserSearch.Migration where

import Data.Aeson
import Database.Bloodhound.Types qualified as ES
import Imports
import Numeric.Natural
import System.Logger.Class (ToBytes (..))

newtype MigrationVersion = MigrationVersion {migrationVersion :: Natural}
  deriving (Show, Eq, Ord)

instance ToJSON MigrationVersion where
  toJSON (MigrationVersion v) = object ["migration_version" .= v]

instance FromJSON MigrationVersion where
  parseJSON = withObject "MigrationVersion" $ \o -> MigrationVersion <$> o .: "migration_version"

instance ToBytes MigrationVersion where
  bytes = bytes . toInteger . migrationVersion

data MigrationException
  = CreateMigrationIndexFailed String
  | FetchMigrationVersionsFailed String
  | PersistVersionFailed MigrationVersion String
  | PutMappingFailed String
  | TargetIndexAbsent
  | VersionSourceMissing (ES.SearchResult MigrationVersion)
  deriving (Show)

instance Exception MigrationException
